Anybody see Jon Stewart on Larry King the other night? This was his jokey take on it (from the transcript):

The 18 percent thing is you really have to think of this in -- let's look at this just purely statistically. Four out of five dentists surveyed recommend sugarless gum for their patients who chew gum. So, there is one out of five dentists who say "You chew gum? Ah, why not put sugar in it?" These are not the best dentists. OK? That's 20 percent. He's not even getting all the dentists who recommend sugared gum. That's low. I think Dracula has a higher Q rating right now than the vice president.